Lichenoid Dermatitis

Lichenoid Dermatitis
Paul K. Shitabata, M.D.
Dermatopathologist
Pathology Inc.
Inflammatory Cell Type
Lichenoid Dermatitis
Superficial/Deep
Follicular Involvement
Lichen Planus
Histopathology
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Epidermal hyperplasia
Hypergranulosis
Usually no parakeratosis
Saw tooth interface
Lymphocytes
Erythema Multiforme
Histopathology
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Sparse lichenoid
interface
Dyskeratotic cells
May have eos
Graft Versus Host Disease
Histopathology
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Cell poor infiltrate
Satellitosis
Late changes of
scleroderma
PLEVA
Pityriasis Lichenoides
PLC
Other
Histopathology
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Parakeratosis
Superficial and deep PV
Lichenoid interface
Lymphocytes
Lymphocytic vasculitis?
Discoid Lupus Erythematosus
Histopathology
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Follicular plugging
Epidermal atrophy
Solar elastosis
SDPV
Interface changes
Periadnexal infiltrate
Dermal mucinosis
Mycosis Fungoides
Histopathology
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Intercalation of basal
keratinocytes with
lymphocytes
Pautrier microabscesss
Intraepithelial
lymphocytes larger than
intradermal
Additional Lichenoid Diseases
Fixed Drug Reaction
Dermatophytosis
Contact Dermatitis
Photoallergic Dermatitis
Inflammatory Cell Type
Lichenoid Dermatitis
Superficial/Deep
Follicular Involvement